10-13-2010, 11:50 AM
[quote name='you2' timestamp='1286885964' post='3592']
For me the #1 advantage of FF is shallow DOF (isolation)
...
[/quote]
...if only we're talking about fixing the FOV (size of object field) and comparing the DOF of cropped and FF bodies. I never had the chance to test it with a FF body but the readings regarding this show that it's the other way around. Let's say that we have a FF compatible 50mm lens and two bodies (FF & 1,5x cropped). The [url="http://www.dofmaster.com/dofjs.html"]DOF calculator[/url] gives following results:
FF + 50mm (F=5.6 and 10m distance from subject) --> DOF = 24,8 meters
1,5 Cropped + 50mm (F=5.6 and 10m distance from subject) --> DOF = 11,3 meters
But,
FF + 75mm (F=5.6 and 10m distance from subject) --> DOF = 6,58 meters (same FOV as in cropped 50mm, shallower DOF)
This relationship between focal length / sensor area / and field of view is very tricky.
Kind regards,
Serkan
For me the #1 advantage of FF is shallow DOF (isolation)
...
[/quote]
...if only we're talking about fixing the FOV (size of object field) and comparing the DOF of cropped and FF bodies. I never had the chance to test it with a FF body but the readings regarding this show that it's the other way around. Let's say that we have a FF compatible 50mm lens and two bodies (FF & 1,5x cropped). The [url="http://www.dofmaster.com/dofjs.html"]DOF calculator[/url] gives following results:
FF + 50mm (F=5.6 and 10m distance from subject) --> DOF = 24,8 meters
1,5 Cropped + 50mm (F=5.6 and 10m distance from subject) --> DOF = 11,3 meters
But,
FF + 75mm (F=5.6 and 10m distance from subject) --> DOF = 6,58 meters (same FOV as in cropped 50mm, shallower DOF)
This relationship between focal length / sensor area / and field of view is very tricky.
Kind regards,
Serkan